Turn all floodlights throughout your house on when any of the motion sensors detect motion. This redesigned Leviton X10 Motion Detector has a feature not available on the X10 PIRs. Multiple units set to the same house code and unit code operate as one system. This is achieved by the fact that these units send the X10 "hail acknowledge" code every 6 seconds while motion is sensed, triggering a two-way response. When these units receive the proper signal, they will all turn on (or reset their timed off if they are already on). A built-in photocell allows night-only operation. Brown finish. 500W. Bulbs not included. Also available are the X10 Motion Detector Floodlights, which send X10 signals to 8 addresses: The first 4 addresses can be set to go on when motion is detected and off after an adjustable time interval; the second 4 addresses can be set to turn on the X10 floodlights when it's dark and then turn them off at dawn.